Manufacture of brushes.



CARL STROBEL, OF GRATZ, AUSTRIA-HUN GARY.

MANUFACTURE or BRUSHES.

Specification of Letters Patent.

Patented April 13, 1909.

Application filed April 8, 1908. Serial No. 425,967.

T 0 all whom it may concern:

Be it known that I, CARL STROBEL, a subject of the Emperor ofAustria-Hungary, and resident of Gratz, Austria-Hungary, have inventedcertain new and useful Improvements in the Manufacture of Brushes, ofwhich the following is a specification.

This invention relates to the manufacture of brushes, and its object isto provide an improved process therefor by which the horsehair bristlesof the same receive greater stifiness, durability and intensity.

The improved process consists in that the bristles cut to the requiredlen 'th are for a certain time steeped in a suitable caustic solution inorder to get impregnated thereby and are after this dried, and finallytheir points areafter the bristles are fixed in the back of thebrush-burned. The small knots and crusts formed on the points by saidburning are then removed by appropriate devices, so that more or less(depending on the degree of im )regnation, e. g. of treatment bycaustic, of the bristles) hardened, hornlike bristle points are left,which when brushing have an intenser action than, and which are not somuch subjected to wear as the hitherto used bristles.

Having fully described my invention, what I claim and. desire to secureby Letters Patent is A process for the manufacture of brushes,consisting in cutting the bristles to the required length, steeping thebristles in a caustic solution, fixing bunches thereof in a brush head,and finally burning the points thereof.

In testimony whereof I have hereunto set my hand in the presence of twosubscribing witnesses.

CARL STROBEL. Witnesses ROBERT W. HEINGARTNER, AUGUST FUGGER.

